Founded in 1953, the Oshkosh Air Show, now called EAA AirVenture Oshkosh, is the United States' biggest annual gathering of aviation ethusiasts hosted every summer at the Wittman Regional Airport in Oshkosh, Wisconsion, United States. The event lasts for seven-days and is produced by the Experimental Aircraft Aossociation (EAA), which is headquarted in Oshkosh. During the week long gathering, Wittman Regional's control tower is the busiest control tower in the world.